The calculated distance (air line) between Saint-Jean-de-la-Ruelle and Cergy-Pontoise is approximately 79 miles respectively 126 kilometers.
By car or train, the actual journey to Cergy-Pontoise is certainly longer, as only the direct route (as the crow flies) between Saint-Jean-de-la-Ruelle and Cergy-Pontoise has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles